Fall 2012
... 10. The pictures on the right represent aqueous solutions of three acids HA (A = X, Y, or Z), with water molecules omitted for clarity. Unshaded spheres represent hydrogen atoms or ions and gray spheres represent A atoms or ions. Which of the three is the strongest acid? a. ...
... 10. The pictures on the right represent aqueous solutions of three acids HA (A = X, Y, or Z), with water molecules omitted for clarity. Unshaded spheres represent hydrogen atoms or ions and gray spheres represent A atoms or ions. Which of the three is the strongest acid? a. ...
CHE 1401 - Summer 2012 - Chapter 5 Homework 5 (Chapter 5
... 19) Which of the following is a statement of Hess's law? A) If a reaction is carried out in a series of steps, the ΔH for the reaction will equal the sum of the enthalpy changes for the individual steps. B) The ΔH for a process in the forward direction is equal to the ΔH for the process in the reve ...
... 19) Which of the following is a statement of Hess's law? A) If a reaction is carried out in a series of steps, the ΔH for the reaction will equal the sum of the enthalpy changes for the individual steps. B) The ΔH for a process in the forward direction is equal to the ΔH for the process in the reve ...
CHE 1401 - Spring 2015 - Chapter 5 Homework 5 (Chapter 5
... B) The ΔH for a process in the forward direction is equal in magnitude and opposite in sign to the ΔH for the process in the reverse direction. C) If a reaction is carried out in a series of steps, the ΔH for the reaction will equal the product of the enthalpy changes for the individual steps. D) Th ...
... B) The ΔH for a process in the forward direction is equal in magnitude and opposite in sign to the ΔH for the process in the reverse direction. C) If a reaction is carried out in a series of steps, the ΔH for the reaction will equal the product of the enthalpy changes for the individual steps. D) Th ...
CHE 1401 - Fall 2016 - Chapter 5 Homework 5 (Chapter 5
... A) The ΔH for a process in the forward direction is equal in magnitude and opposite in sign to the ΔH for the process in the reverse direction. B) The ΔH of a reaction depends on the physical states of the reactants and products. C) If a reaction is carried out in a series of steps, the ΔH for the r ...
... A) The ΔH for a process in the forward direction is equal in magnitude and opposite in sign to the ΔH for the process in the reverse direction. B) The ΔH of a reaction depends on the physical states of the reactants and products. C) If a reaction is carried out in a series of steps, the ΔH for the r ...
CHE 1401 - Spring 2016 - Chapter 5 Homework 5 (Chapter 5
... 39) Which one of the following conditions would always result in an increase in the internal energy of a system? A) The system gains heat and has work done on it by the surroundings. B) The system gains heat and does work on the surroundings. C) The system loses heat and does work on the surrounding ...
... 39) Which one of the following conditions would always result in an increase in the internal energy of a system? A) The system gains heat and has work done on it by the surroundings. B) The system gains heat and does work on the surroundings. C) The system loses heat and does work on the surrounding ...
Test 2 - Northwest Florida State College
... 11) Still know Avogadro’s Number (Chapter 2) and be able to convert between number of items (atoms, molecules, ions, etc.) and moles of that item. Be able to combine this calculation with molar mass. (1 mole items = 6.022 x 1023 items) 12) Be able to convert between moles of a compound and moles of ...
... 11) Still know Avogadro’s Number (Chapter 2) and be able to convert between number of items (atoms, molecules, ions, etc.) and moles of that item. Be able to combine this calculation with molar mass. (1 mole items = 6.022 x 1023 items) 12) Be able to convert between moles of a compound and moles of ...
Lecture 22 - Chemistry Courses
... First, the approximation will be made that the activity of the species in solution are equivalent to the numerical values of concentration given in moles per liter (M). For a weak acid, the extent of proton transfer is so small that it is usually assumed that the molar concentration of HA is unchang ...
... First, the approximation will be made that the activity of the species in solution are equivalent to the numerical values of concentration given in moles per liter (M). For a weak acid, the extent of proton transfer is so small that it is usually assumed that the molar concentration of HA is unchang ...
chapter 16
... to products, energy is released. In a chemical reaction, the minimum energy necessary for reaching the activated complex and proceeding to products is called the activation energy. Only the collisions that provide a net kinetic energy equal to or greater than the activation energy can lead to produc ...
... to products, energy is released. In a chemical reaction, the minimum energy necessary for reaching the activated complex and proceeding to products is called the activation energy. Only the collisions that provide a net kinetic energy equal to or greater than the activation energy can lead to produc ...
Chem 1411 Chapter 4
... Oxidation and Reduction Reactions An oxidation reaction is the one that involves loss of electrons and a reduction reaction involves the gain of electrons. A reaction in which oxidation and reduction occurs simultaneously is called a redox reaction. The species that undergoes oxidation is the reduct ...
... Oxidation and Reduction Reactions An oxidation reaction is the one that involves loss of electrons and a reduction reaction involves the gain of electrons. A reaction in which oxidation and reduction occurs simultaneously is called a redox reaction. The species that undergoes oxidation is the reduct ...
Thermochemistry
... 3· Define and apply the terms lattice enthalpy and electron affinity 4. Explain how the relative sizes and the charges of ions affect the lattice enthalpies of different ionic compounds 5. Construct a Born-Haber cycle for group 1 and group 2 oxides and chlorides, and use it to calculate an enthalpy ...
... 3· Define and apply the terms lattice enthalpy and electron affinity 4. Explain how the relative sizes and the charges of ions affect the lattice enthalpies of different ionic compounds 5. Construct a Born-Haber cycle for group 1 and group 2 oxides and chlorides, and use it to calculate an enthalpy ...
Chemical Equations and Reactions
... The coefficients indicate relative, not absolute, amounts of reactants and products A chemical equation usually shows the smallest numbers of atoms, molecules, or ions that will satisfy the law of conservation of mass….to get larger amounts, multiply each coefficient by the same number: ...
... The coefficients indicate relative, not absolute, amounts of reactants and products A chemical equation usually shows the smallest numbers of atoms, molecules, or ions that will satisfy the law of conservation of mass….to get larger amounts, multiply each coefficient by the same number: ...
Chemical equilibrium
In a chemical reaction, chemical equilibrium is the state in which both reactants and products are present in concentrations which have no further tendency to change with time. Usually, this state results when the forward reaction proceeds at the same rate as the reverse reaction. The reaction rates of the forward and backward reactions are generally not zero, but equal. Thus, there are no net changes in the concentrations of the reactant(s) and product(s). Such a state is known as dynamic equilibrium.